Help get this topic noticed by sharing it on Twitter, Facebook, or email.
I’m frustrated

My iO2 Express will not send a "Note off" message

I'm using 'io2 express' with ASIO4ALL driver
and it has some problem with MIDI input.
When I play master keyboard, some note(s) keeps
making sounds. (not stop after key is unpressed)
- Not always, often -
I tested with other keyboard and still no change.
I'm suspecting the driver (asio4all) and I think this
product needs a driver for itself.
1 person has
this problem
+1
Reply
  • Hi Sam,

    Thanks for posting. I'll be happy to help!

    The reason for a “stuck note” is that a "Note Off" message is not being read by the software.  This can happen with virtually any MIDI controller on the market.

    What version of Windows are you using this with? Have you tried replacing the USB cable?

    Let's make sure your system is properly optimized for audio production. Please follow the steps in this helpful guide here: Optimizing Your System, Improving Performance, and Managing Latency

    The most likely cause for stuck notes is the computer itself. For example, background programs may be running behind the scenes, packages of information may transfer from and to the internet, optimization of programs and background processes need to be adjusted - all of these and more can cause “stuck notes”. You can see the same root problem cause other symptoms often in every day computer use.  For example, when a mouse pointer freezes or you click somewhere and nothing happens, when you try to close a program and it takes a long time to close or does not close at all and an error comes up, and when it takes a very long time to reboot your computer.

    In years past, a bad 5-pin DIN MIDI cable could be the cause of a stuck note or other MIDI transfer symptom.  More than once we have seen a simple MIDI cable switch resolve very troubled users of all of their symptoms. More recently, with the increased useage of USB cables transferring MIDI information to the computer, the likelihood of the USB cable causing similar symptoms has been reduced.  While it is still possible - and we have documented cases where changing the USB cable has resolved similar MIDI transfer symptoms - it is far less likely to be the cause.  

    Additionally, on my personal computer, a failing USB port was the cause of a ton of difficulty until I was able to determine the root cause.

    The least likely cause would be the MIDI controller, itself. There is an easy way to determine if the controller is the cause:

    Windows

    • Download the free MIDI OX  program
    • Run the MIDI OX application.
    • Select the Options menu and select MIDI Devices. Make sure to select MIDI inputs and MIDI Outputs for the MIDI controller and click OK.
    • Strike a key and release.  
    • You will see both a Note On and Note Off message.  If you see both, this tells you that the controller is sending the MIDI message correctly and the cause of the symptoms is somewhere else.

    Mac

    • Download the free program MIDI Monitor.
    • Click on the Sources tab to view MIDI devices. Confirm that your USB/MIDI device is listed.
    • Strike a key and release.  
    • You will see both a Note On and Note Off message.  If you see both, this tells you that the controller is sending the MIDI message correctly and the cause of the symptoms is somewhere else.
    Hope this helps!
  • (some HTML allowed)
    How does this make you feel?
    Add Image
    I'm

    e.g. indifferent, undecided, unconcerned happy, confident, thankful, excited sad, anxious, confused, frustrated kidding, amused, unsure, silly

  • (some HTML allowed)
    How does this make you feel?
    Add Image
    I'm

    e.g. kidding, amused, unsure, silly happy, confident, thankful, excited indifferent, undecided, unconcerned sad, anxious, confused, frustrated